Run: 2026-07-09-01KX40MM0H8STJETFJPZKEEVZM

Run Details

Duration:
16.7s
Cost:
$0.016735
Provider:
OpenAI

Model input

System
You are an expert novelist with a gift for vivid, immersive prose. You write in tight third-person limited point of view with a strong narrative voice. Your prose is clean, precise, and engaging — you favor strong verbs, concrete details, and natural-sounding dialogue. You will be given a story bible (codex) containing canonical details about characters, locations, items, and lore. Use these details to ground your writing in the established world. Stay consistent with the codex. Write only the prose of the scene. Do not include titles, chapter headings, markdown formatting, or any commentary before or after the scene.
User/Human
<codex> <character id="4416" name="Detective Harlow Quinn" aliases="Quinn, Detective Quinn, Harlow" pronouns="she/her" species="Human" storyRole="Antagonist"> <eyeColor>brown</eyeColor> <hair>closely cropped salt-and-pepper</hair> <height>5'9"</height> <age>41</age> <jawline>sharp jaw</jawline> <watch>worn leather watch on her left wrist</watch> <bearing>military precision</bearing> <description>A Metropolitan Police detective with 18 years of decorated service who suspects the clique is involved in criminal activity.</description> <backstory>She lost her partner, DS Morris, during a case three years ago under unexplained circumstances that had supernatural origins she doesn't yet understand.</backstory> </character> <character id="4414" name="Eva Kowalski" aliases="Eva, Evie" pronouns="she/her" species="Human" storyRole="Best Friend"> <eyeColor>green</eyeColor> <hair>curly red</hair> <height>5'4"</height> <age>26</age> <glasses>round glasses</glasses> <satchel>worn leather satchel full of books</satchel> <freckles>freckled complexion</freckles> <nervousHabit>tucking hair behind her left ear</nervousHabit> <description>Aurora's childhood friend and an occult researcher.</description> <backstory>Moved to London two years before Aurora and works as a research assistant at the British Museum's restricted archives. She holds a master's degree in Ancient History from Oxford.</backstory> </character> <location id="856" name="The Veil Market" aliases="Veil Market, the Market, underground market" realm="Earth"> <currentLocation>abandoned Tube station beneath Camden</currentLocation> <entryRequirement>bone token</entryRequirement> <schedule>moves locations every full moon</schedule> <description>A hidden supernatural black market that sells enchanted goods, banned alchemical substances, and information.</description> </location> <item id="2004" name="Veil Compass" aliases="the Compass, shadow compass" type="Tool" origin="The Veil Market"> <casingMaterial>small brass compass</casingMaterial> <faceMarkings>face etched with protective sigils</faceMarkings> <needle>points toward the nearest supernatural rift or portal</needle> <patina>casing has a patina of verdigris</patina> <creator>crafted by a Shade artisan</creator> <description>A compass attuned to supernatural energy.</description> </item> </codex> Write a fully fleshed out scene of at least 1000 words in the mystery genre. A detective arrives at a crime scene in an unusual location. Something is wrong — the evidence doesn't add up. A colleague is present, offering a different interpretation. Through careful observation and deduction, the detective begins to see what others have missed. Use the codex entries above as your world reference for characters and setting. Only include the prose of the scene without any markdown or commentary.

Model response

AI
The abandoned Tube station beneath Camden had no business breathing. Detective Harlow Quinn felt it in the first gust that met her at the bottom of the service stairs: warm air pushing upward through the dark, carrying the smells of wet stone, candle wax, and something sweetly metallic. The station had been sealed since the war, according to the council records. No trains ran beneath it. No electricity fed its lamps. Yet blue flames burned in saucers along the platform, and the old tiled walls sweated as if the tunnels beyond were alive. Quinn stepped over the chalk line at the platform entrance. Her boots struck the cracked mosaic with military precision. She kept her left wrist turned inward, the worn leather of her watch snug against her pulse. “Thought you’d never get here,” said Sergeant Bell. He stood beside the body with his notebook open, his round face flushed from the climb down. Bell had been in uniform for twelve years and still looked uncomfortable whenever a crime scene failed to behave like an ordinary crime scene. Quinn surveyed the platform before answering. The abandoned station had become a market. Stalls crowded the disused platform beneath ragged awnings: bottles of black liquid, cages lined with silver wire, bundles of dried herbs that twitched in their strings. Most had been overturned or abandoned. A torn sign reading CAMDEN HIGH LEVEL hung above the tracks, its letters filmed with soot. At the center of the chaos lay a man in a charcoal coat. His throat had been cut. The blood had not spread. It had risen. A dark red ribbon hung in the air above his neck, twisting slowly toward the vaulted ceiling. Droplets hovered around it like beads on invisible thread. Bell gestured to the body. “Victim’s unidentified. Male, late thirties, maybe forty. No wallet. No phone. One stab wound, though the throat’s the obvious cause of death. We’ve got witnesses being held on the other platform.” “Who called it in?” “Anonymous message through the emergency line. Caller said there’d been a murder in the old station. Then the line went dead.” “Time?” “Twenty-three forty-eight.” Quinn checked her watch. “We got here at zero twenty-three.” “Eleven minutes after that, the market vanished.” She looked at him. Bell swallowed. “Not vanished exactly. The stalls were here when the first officers arrived. Then the lights flickered, and half the people in the place simply weren’t. No doors opened. No one came down the stairs. They were just gone.” “You’re suggesting everyone here was a ghost?” “I’m suggesting I don’t know what I’m suggesting.” “That’s why you’re a sergeant.” Bell gave her a tired look. “The scene doesn’t make sense, Detective.” “Scenes rarely do when people start lying.” He moved closer to the body. “Dr. Shah’s preliminary view is that the throat wound came first. The vertical cut in the coat is secondary. She thinks the victim was attacked from the front, dropped backward, and struck the tile.” Quinn studied the corpse. The man lay on his back, arms loose at his sides. His coat was unbuttoned. A narrow blade had pierced the fabric just below the sternum. The wound was clean, almost delicate. There was no blood around it. The throat wound was ragged, but the skin surrounding it had browned as though cauterized. No splatter marked the tiles. No blood stained the collar. Quinn crouched without touching the body. “What did Dr. Shah use for the time of death?” “Body temperature. Rigor. The usual.” “Here?” Bell hesitated. “She took the readings before the station went strange.” “Everything here is strange.” On the far side of the platform, a woman in a dark coat stood beneath one of the blue lamps. She was short, freckled, and red curls spilled around her face. Round glasses caught the unnatural light. A worn leather satchel hung from her shoulder, bulging with books. Eva Kowalski. Quinn knew her name from three separate reports involving illicit antiquities and an unlicensed séance in Bloomsbury. Research assistant at the British Museum’s restricted archives. Clever, evasive, and always present wherever the evidence became inconvenient. Eva was watching Quinn with the wary concentration of someone who had already realized the detective was not going to accept the first explanation. “You know her?” Bell asked. “I know of her.” Eva tucked a curl behind her left ear. Quinn noticed the gesture. Nervous habit. Repeated whenever she spoke to police, according to the notes. “Bring her over,” Quinn said. Bell started across the platform, but Eva raised her voice. “Don’t step on the blue chalk.” Bell stopped. Quinn followed his gaze. A thin ring of powder encircled the corpse, interrupted only at the point where Bell’s boot had crossed it. “What happens if he does?” Quinn asked. Eva’s green eyes flicked toward the body. “You may find out.” “Sergeant, step back.” Bell obeyed, though his expression made clear what he thought of taking instructions from a museum researcher. Quinn pointed to the ring. “What is it?” “Protection.” “Against what?” Eva’s mouth tightened. “Interference.” “That isn’t an answer.” “It’s the only one you’ll believe later.” Quinn walked around the circle, careful to keep her boots outside the powder. The blue grains shone faintly. Chalk, perhaps, but with silver threaded through it. She had seen residue like that on the walls of the flat where DS Morris died three years ago. The official report had called it industrial contamination. Quinn had never believed it. Morris had been found in an empty warehouse with no visible injuries and a pocketful of ash. The case had collapsed when the only witness disappeared from a locked hospital room. She had kept the ash in an evidence envelope. It had vanished from the evidence room six weeks later. “Your interpretation,” Quinn said to Eva. “Give me the short version.” “The man was murdered by someone who wanted the body found.” Bell snorted. “That’s not much of an interpretation.” Eva ignored him. “The wound in the chest is theater. The cut throat is the actual cause of death, but not because of the knife.” Quinn looked again at the hovering blood. “What caused it?” “An opening.” “In his throat?” “In the air.” The platform seemed to contract around them. Blue flames bent toward the tracks. Quinn kept her voice flat. “You’re saying the victim was killed by a portal.” “I’m saying a rift opened through him.” Bell muttered something under his breath. Eva’s face tightened with impatience. “Look at the blood. It’s moving upward because the pressure is wrong. Look at the dust on the tiles.” Quinn followed the line of Eva’s pointing finger. A fine gray dust lay across the platform, disturbed in a narrow path from the track edge to the corpse. Not footprints. Something had been dragged, but there were no drag marks through the dust. Instead, the dust had been pushed aside in two long arcs, like the wake of a boat. “Victim walked here?” Quinn asked. “Not willingly.” “Then he was dragged.” “No.” Eva stepped nearer, stopping outside the blue ring. “He was pulled through.” Quinn looked at the man’s shoes. The soles were clean. His coat hem was dry despite the damp platform. But the back of his head had not struck the tile; there was no swelling, no abrasion. He had been placed down after death. She examined the chest wound again. The fabric around it was torn inward, not outward. The blade had entered from the front—but there was no corresponding damage to the shirt beneath. Quinn’s attention sharpened. “Bell. Evidence photographs.” He opened the folder and handed her a series of prints. The first showed the body as discovered. The second showed the chest wound from above. In the third, taken after the coat had been opened, the shirt beneath was intact except for a dark, circular stain. Quinn held the photograph closer. The stain was not blood. It was soot. “Where’s the weapon?” she asked. Bell pointed to a silver knife lying three feet from the corpse. Its handle was wrapped in red thread. No fingerprints. No blood on the blade. Quinn looked at the wound, then at the knife. “The knife was planted.” Eva nodded. “Yes.” “Why leave it?” “To tell you a lie.” “Which is?” “That the killer stood over him.” Quinn rose. “Where is the blood coming from?” Eva glanced toward the vaulted ceiling. “Not the body.” The suspended ribbon twisted. At its upper end, it narrowed to a thread and disappeared into a dark fracture in the air above the platform. The crack was barely visible: a jagged seam where the blue light bent around emptiness. Quinn had been staring at the blood. She had missed the tear. The rift pulsed once. The victim’s fingers moved. Bell drew his weapon. Quinn seized his wrist. “Don’t.” The corpse’s eyes remained closed. Its fingers curled inward, one at a time, as though grasping for something beneath the tiles. Eva’s satchel shifted. Books thudded against one another. “Something’s coming through,” she whispered. Quinn saw then what the others had missed. Every object in the station pointed toward the rift. The blue flames leaned toward it. Loose papers crawled across the tiles. Even the blood climbed in its direction. But the body did not. The corpse’s shadow stretched away from the rift, opposite the light. Quinn crouched again, studying the shadow. It was too long and too dark. Its outline did not match the man’s body. One arm reached toward the tracks, though the corpse’s arm lay flat beside him. “There,” she said. Eva went pale. “That’s not his shadow.” “No,” Quinn said. “It’s the killer’s.” The dark shape peeled itself from the tile. It rose without a body, a person-shaped absence lifting behind the corpse. The air filled with the smell of cold iron. Bell fired. The shot cracked through the station, but the bullet passed into darkness and struck the tiled wall. Quinn grabbed the silver knife and threw it into the shadow. The blade vanished. For one instant, the rift flared white. The shadow jerked toward it, and the red thread around the knife’s handle snapped tight, revealing a line that ran from the weapon to the fracture overhead. “A tether,” Eva said. Quinn seized the red thread with her gloved hand. Heat burned through the leather. The thing in the shadow turned its faceless head toward her. Morris had died in a warehouse with ash in his pocket. The official report had said there was no weapon. Quinn pulled. The tether cut into her glove, but the rift shuddered. The shadow stretched between them, no longer free to retreat. Eva opened her satchel and thrust a brass compass into Quinn’s hand. It was small, green with verdigris, its face etched with protective sigils. The needle spun wildly, then locked toward the fracture. “Put it against the thread!” Eva shouted. Quinn pressed the compass to the burning red line. The station screamed. Not a human sound. Tile cracked. Glass shattered in the stalls. The suspended blood dropped all at once, splashing over the corpse and the blue ring. The rift snapped shut like a mouth. The shadow collapsed. The red thread fell limp. Silence rushed in behind it. Quinn stood over the body, breathing hard. The brass compass trembled in her hand, its needle still fixed on the empty air. Bell stared at the bullet hole in the wall. “What the hell was that?” Eva retrieved the compass. Her fingers shook as she tucked it into the satchel. “The reason this market moves every full moon,” she said. “The reason people disappear. The reason your victim had no shadow when he arrived.” Quinn looked down. The corpse now cast a normal shadow beneath the blue lamps. But in the wet blood at the man’s throat, reflected upside down, stood the shape of a second figure. Its hand was pressed against the other side of the closed rift. Quinn touched the leather watch on her wrist. “What was his name?” Eva looked toward the abandoned tracks. “I don’t know.” “Find out.” “And then?” Quinn turned to the sealed fracture in the air. Her reflection stared back from the darkness, sharp jaw, cropped salt-and-pepper hair, brown eyes that had learned not to look away. “Then,” she said, “we find whoever taught it to kill.”
created_at"2026-07-09T18:01:03.274Z" 7/9/2026, 6:01:03 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency391
moderation_latency(null)
generation_time16262
tokens_prompt923
tokens_completion3438
native_tokens_prompt835
native_tokens_completion2650
native_tokens_completion_images0
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
service_tier"default"
usage0.016735
router(null)
provider_responses
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endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0b6332b0d1294465016a4fe1df677c819594f39244fffd77ae"
is_byokfalse
latency232
model_permaslug"openai/gpt-5.6-luna-20260709"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783620063-gcPXsAU9YYFbPNZgRSFf"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620063-BUyuSYvmwFtbDrC4cDHC"
upstream_id"resp_0b6332b0d1294465016a4fe1df677c819594f39244fffd77ae"
total_cost0.016735
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags14
adverbTagCount0
adverbTags(empty)
dialogueSentences76
tagDensity0.184
leniency0.368
rawRatio0
effectiveRatio0
95.14% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount2056
totalAiIsmAdverbs2
found
0
adverb"sweetly"
count1
1
adverb"slowly"
count1
highlights
0"sweetly"
1"slowly"
100.00% AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions(empty)
found(empty)
100.00% AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions(empty)
found(empty)
78.11% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount2056
totalAiIsms9
found
0
word"mosaic"
count1
1
word"pulse"
count1
2
word"flickered"
count1
3
word"flicked"
count1
4
word"pulsed"
count1
5
word"etched"
count1
6
word"shattered"
count1
7
word"silence"
count1
8
word"trembled"
count1
highlights
0"mosaic"
1"pulse"
2"flickered"
3"flicked"
4"pulsed"
5"etched"
6"shattered"
7"silence"
8"trembled"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches1
maxInWindow1
found
0
label"hung in the air"
count1
highlights
0"hung in the air"
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells1
narrationSentences190
matches
0"looked uncomfortable"
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount3
hedgeCount1
narrationSentences190
filterMatches
0"watch"
hedgeMatches
0"seemed to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences251
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen39
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords2055
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions21
unquotedAttributions0
matches(empty)
27.36% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions87
wordCount1590
uniqueNames12
maxNameDensity2.45
worstName"Quinn"
maxWindowNameDensity4
worstWindowName"Quinn"
discoveredNames
Tube1
Camden1
Harlow1
Quinn39
Sergeant1
Bell17
Kowalski1
Bloomsbury1
British1
Museum1
Eva20
Morris3
persons
0"Camden"
1"Harlow"
2"Quinn"
3"Sergeant"
4"Bell"
5"Kowalski"
6"Museum"
7"Eva"
8"Morris"
places
0"Bloomsbury"
1"British"
globalScore0.274
windowScore0.333
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences115
glossingSentenceCount1
matches
0"as though grasping for something beneath the tiles"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount2055
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences251
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs150
mean13.7
std13.58
cv0.991
sampleLengths
010
161
222
336
48
541
66
755
813
95
105
113
1226
1336
144
1521
161
172
1810
197
204
2140
227
238
245
2512
267
2740
284
2938
3025
316
3210
335
341
3511
364
3748
382
3935
4024
415
424
438
4416
455
4616
472
4823
497
86.80% Passive voice overuse
Target: ≤2% passive sentences
passiveCount10
totalSentences190
matches
0"been sealed"
1"been overturned"
2"was unbuttoned"
3"been found"
4"been dragged"
5"been pushed"
6"been placed"
7"was torn"
8"been opened"
9"was wrapped"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount1
totalVerbs265
matches
0"was watching"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount1
semicolonCount1
flaggedSentences2
totalSentences251
ratio0.008
matches
0"But the back of his head had not struck the tile; there was no swelling, no abrasion."
1"The blade had entered from the front—but there was no corresponding damage to the shirt beneath."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1594
adjectiveStacks0
stackExamples(empty)
adverbCount43
adverbRatio0.026976160602258468
lyAdverbCount7
lyAdverbRatio0.00439146800501882
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences251
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences251
mean8.19
std6.31
cv0.771
sampleLengths
010
138
213
35
45
522
610
79
817
98
1017
1124
126
137
1426
156
1616
1713
185
195
203
2117
229
235
2431
254
2621
271
282
294
306
317
324
332
3438
357
368
375
386
396
407
416
4234
434
4411
454
4611
476
486
4915
47.68% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats12
diversityRatio0.3147410358565737
totalSentences251
uniqueOpeners79
40.40% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount2
totalSentences165
matches
0"Instead, the dust had been"
1"Even the blood climbed in"
ratio0.012
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount27
totalSentences165
matches
0"Her boots struck the cracked"
1"She kept her left wrist"
2"He stood beside the body"
3"His throat had been cut."
4"It had risen."
5"She looked at him."
6"He moved closer to the"
7"His coat was unbuttoned."
8"She was short, freckled, and"
9"She had seen residue like"
10"She had kept the ash"
11"It had vanished from the"
12"His coat hem was dry"
13"He had been placed down"
14"She examined the chest wound"
15"He opened the folder and"
16"It was soot."
17"Its handle was wrapped in"
18"She had missed the tear."
19"Its fingers curled inward, one"
ratio0.164
44.85% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount137
totalSentences165
matches
0"The abandoned Tube station beneath"
1"Detective Harlow Quinn felt it"
2"The station had been sealed"
3"Quinn stepped over the chalk"
4"Her boots struck the cracked"
5"She kept her left wrist"
6"He stood beside the body"
7"Bell had been in uniform"
8"Quinn surveyed the platform before"
9"The abandoned station had become"
10"Stalls crowded the disused platform"
11"A torn sign reading CAMDEN"
12"His throat had been cut."
13"The blood had not spread."
14"It had risen."
15"A dark red ribbon hung"
16"Droplets hovered around it like"
17"Bell gestured to the body."
18"Quinn checked her watch."
19"She looked at him."
ratio0.83
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences165
matches(empty)
ratio0
71.43% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences60
technicalSentenceCount6
matches
0"Detective Harlow Quinn felt it in the first gust that met her at the bottom of the service stairs: warm air pushing upward through the dark, carrying the smells…"
1"Yet blue flames burned in saucers along the platform, and the old tiled walls sweated as if the tunnels beyond were alive."
2"Stalls crowded the disused platform beneath ragged awnings: bottles of black liquid, cages lined with silver wire, bundles of dried herbs that twitched in their…"
3"The throat wound was ragged, but the skin surrounding it had browned as though cauterized."
4"Eva was watching Quinn with the wary concentration of someone who had already realized the detective was not going to accept the first explanation."
5"Her reflection stared back from the darkness, sharp jaw, cropped salt-and-pepper hair, brown eyes that had learned not to look away."
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags14
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags13
fancyCount2
fancyTags
0"she whispered (whisper)"
1"Eva shouted (shout)"
dialogueSentences76
tagDensity0.171
leniency0.342
rawRatio0.154
effectiveRatio0.053
86.3920%